﻿<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="utf-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta
      name="viewport"
      content="width=device-width, initial-scale=1, maximum-scale=1, minimum-scale=1, user-scalable=no"
    />
    <meta name="description" content="Ambient Occlusion." />
    <meta
      name="cesium-sandcastle-labels"
      content="Showcases, Post Processing"
    />
    <title>Cesium Demo</title>
    <script type="text/javascript" src="../Sandcastle-header.js"></script>
    <script
      type="text/javascript"
      src="../../../Build/CesiumUnminified/Cesium.js"
      nomodule
    ></script>
    <script type="module" src="../load-cesium-es6.js"></script>
  </head>
  <body
    class="sandcastle-loading"
    data-sandcastle-bucket="bucket-requirejs.html"
  >
    <style>
      @import url(../templates/bucket.css);
    </style>
    <div id="cesiumContainer" class="fullSize"></div>
    <div id="loadingOverlay"><h1>Loading...</h1></div>
    <div id="toolbar">
      <table>
        <tbody>
          <tr>
            <td>Ambient Occlusion</td>
            <td><input type="checkbox" data-bind="checked: show" /></td>
          </tr>
          <tr>
            <td>Ambient Occlusion Only</td>
            <td>
              <input
                type="checkbox"
                data-bind="checked: ambientOcclusionOnly"
              />
            </td>
          </tr>
          <tr>
            <td>Intensity</td>
            <td>
              <input
                type="range"
                min="1"
                max="10"
                step="1"
                data-bind="value: intensity, valueUpdate: 'input'"
              />
            </td>
          </tr>
          <tr>
            <td>Length Cap</td>
            <td>
              <input
                type="range"
                min="0"
                max="1"
                step="0.01"
                data-bind="value: lengthCap, valueUpdate: 'input'"
              />
            </td>
          </tr>
          <tr>
            <td>Step Size</td>
            <td>
              <input
                type="range"
                min="1"
                max="10"
                step="0.01"
                data-bind="value: stepSize, valueUpdate: 'input'"
              />
            </td>
          </tr>
          <tr>
            <td>Bias</td>
            <td>
              <input
                type="range"
                min="0"
                max="1"
                step="0.01"
                data-bind="value: bias, valueUpdate: 'input'"
              />
            </td>
          </tr>
          <tr>
            <td>Blur Step Size</td>
            <td>
              <input
                type="range"
                min="0"
                max="4"
                step="0.01"
                data-bind="value: blurStepSize, valueUpdate: 'input'"
              />
            </td>
          </tr>
        </tbody>
      </table>
    </div>
    <script id="cesium_sandcastle_script">
      function startup(Cesium) {
        "use strict";
        //Sandcastle_Begin
        const viewer = new Cesium.Viewer("cesiumContainer");

        if (
          !Cesium.PostProcessStageLibrary.isAmbientOcclusionSupported(
            viewer.scene
          )
        ) {
          window.alert(
            "This browser does not support the ambient occlusion post process."
          );
        }

        // Power Plant design model provided by Bentley Systems
        const tileset = new Cesium.Cesium3DTileset({
          url: Cesium.IonResource.fromAssetId(8564),
        });
        tileset.readyPromise
          .then(function (tileset) {
            viewer.scene.primitives.add(tileset);
          })
          .catch(function (error) {
            console.log(error);
          });

        const viewModel = {
          show: true,
          ambientOcclusionOnly: false,
          intensity: 3.0,
          bias: 0.1,
          lengthCap: 0.03,
          stepSize: 1.0,
          blurStepSize: 0.86,
        };

        Cesium.knockout.track(viewModel);
        const toolbar = document.getElementById("toolbar");
        Cesium.knockout.applyBindings(viewModel, toolbar);
        for (const name in viewModel) {
          if (viewModel.hasOwnProperty(name)) {
            Cesium.knockout
              .getObservable(viewModel, name)
              .subscribe(updatePostProcess);
          }
        }

        function updatePostProcess() {
          const ambientOcclusion =
            viewer.scene.postProcessStages.ambientOcclusion;
          ambientOcclusion.enabled =
            Boolean(viewModel.show) || Boolean(viewModel.ambientOcclusionOnly);
          ambientOcclusion.uniforms.ambientOcclusionOnly = Boolean(
            viewModel.ambientOcclusionOnly
          );
          ambientOcclusion.uniforms.intensity = Number(viewModel.intensity);
          ambientOcclusion.uniforms.bias = Number(viewModel.bias);
          ambientOcclusion.uniforms.lengthCap = Number(viewModel.lengthCap);
          ambientOcclusion.uniforms.stepSize = Number(viewModel.stepSize);
          ambientOcclusion.uniforms.blurStepSize = Number(
            viewModel.blurStepSize
          );
        }
        updatePostProcess();

        const camera = viewer.scene.camera;
        camera.position = new Cesium.Cartesian3(
          1234127.2294710164,
          -5086011.666443127,
          3633337.0413351045
        );
        camera.direction = new Cesium.Cartesian3(
          -0.5310064396211631,
          -0.30299013818088416,
          -0.7913464078682514
        );
        camera.right = new Cesium.Cartesian3(
          -0.8468592075426076,
          0.1574051185945647,
          0.507989282604011
        );
        camera.up = Cesium.Cartesian3.cross(
          camera.right,
          camera.direction,
          new Cesium.Cartesian3()
        );

        //Sandcastle_End
        Sandcastle.finishedLoading();
      }
      if (typeof Cesium !== "undefined") {
        window.startupCalled = true;
        startup(Cesium);
      }
    </script>
  </body>
</html>
